Answer / dileep

At the time of starting a tube choke gives rise to high
voltage by di/dt nearly 1000 volts by starter ON-OFF
function rate of change of voltage becomes high due to
inductance of choke. This high voltage starts ionization of
gas in the tube. Once gas gets ionised and starts
conducting then starter gets out of circuit and circuit is
completed only through choke which now share voltage(limit
voltage) for tube because after esabilishing ionization now
to maintain it only nearly half of the voltage is required.

Answer / manish tailor

The function of choke is to provide high voltage enough for
ionization to take place in a tube light and after
establishment and substenance of ionization, limit the
voltage across the tube. That is the reason why a tube
fuses when the choke is shorted.

Answer / nimish

To start the tubelight. we have to ionise the gas inside
tubelight like murcury which ionise at high voltage around
1000 to 1500 V it is provided by choke.

Answer / suchak nimish

It is used to provide high voltage approximately 1000 to
1500 Volt.

Answer / rathnam

the property of the inductor is to oppose the rate of
change of current through it suddenly. At the time of
starting it requires high voltage to ionise the gas (
through creating potential difference between the
electrodes) in the tube so choke creates required potential.
The starter is same as that of a capacitor, to improve the
power factor the total system(connection of R and L) it is
required.

Answer / ramesh

The choke acts a regulator and controls the current flow
thro' the flourescent tube.

Answer / sabarinathan frm sec

the purpose of choke in a fluorescent lamp is to increase
the voltage momentarily,

Answer / selvan

answer 3 is very correct

Answer / sudibala

answer 3 is correct

Answer / radhakrishnan p.n.

answer 3 very correct

what is means of CLASS in current transformer name plate?

3 Answers  

i have done diploma and btech in EE and live in Chandigarh so kindly help me how can i make my competency certificate in my area.

0 Answers   Multi Metals, ONGC,

Wat is power factor exact meaning in terms of technical terms plz explain ?

4 Answers  

what is impedance in a transformer? how can i calculate it?

1 Answers  

Alternating voltage and current is which type of quantities?

1 Answers  

What happen to the transformer if the OLTC frequently used for lower and raise occured 50times daily?

0 Answers  

I want formula to calculate current loss with distance in km.I searched many sites but didn't right answer.Plz reply me

0 Answers   SECL,

how df/dt relay operates & how it works?

1 Answers  

what are the problems are there if power factor is leading

3 Answers   NTPC,

sir,i am swati. i am goin to gv jspl exam on 21st nov'10. iwant previous year question paper. plz help me out. my emailid is swatisinha.dav@gmail.com

1 Answers  

The safest value of current which can pass from human body?

4 Answers   Jindal,

1)Explain why the cradle guard is used on railway crossing in overhead line construction?

0 Answers